Midnight In The Desert — levitation

The world's most powerful acoustic tractor beam could pave the way for levitating humans

Posted by K R on

The world's most powerful acoustic tractor beam could pave the way for levitating humans

Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids or liquids. For the first time University of Bristol engineers have shown it is possible to stably trap objects larger than the wavelength of sound in an acoustic tractor beam. This discovery opens the door to the manipulation of drug capsules or micro-surgical implements within the body. Container-less transportation of delicate larger samples is now also a possibility and could lead to levitating humans. Researchers previously thought that acoustic tractor beams were fundamentally limited to levitating small objects...

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Tiny, levitating balls make up this weird ‘JOLED’ display

Posted by K R on

Tiny, levitating balls make up this weird ‘JOLED’ display

LCDs are old hat, my friend. What you need is dozens of tiny spheres levitated and spun using ultrasonics. That’s what researchers at the Universities of Sussex and Bristol have cooked up, and it’s exactly as weird as you think. Though not as weird as this sweating robot. The display uses “Janus objects” as “physical voxels” with “acoustic levitation.” That about sums it up, right? Well, maybe it could use a bit more detail. The Janus objects are basically tiny polystyrene beads. They’re held in midair by opposing ultrasound forces being emitted from speakers above and below; each bead has...

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Acoustic levitation of a large sphere

Posted by K R on

Acoustic levitation of a large sphere

When placed in an acoustic field, small objects experience a net force that can be used to levitate the objects in air. In a new study, researchers have experimentally demonstrated the acoustic levitation of a 50-mm (2-inch) solid polystyrene sphere using ultrasound—acoustic waves that are above the frequency of human hearing. The demonstration is one of the first times that an object larger than the wavelength of the acoustic wave has been acoustically levitated. Previously, this has been achieved only for a few specific cases, such as wire-like and planar objects. In the new study, the levitated sphere is 3.6...

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China's Transit Elevated Bus Debuts at Beijing Intel High Tech Expo

Posted by K R on

China's Transit Elevated Bus Debuts at Beijing Intel High Tech Expo

A model of a Transit Elevated Bus (TEB) debuted at the ongoing 19th China Beijing International High-Tech Expo. TEB is a purely homegrown invention of China. Its passenger compartment rises far above other vehicles on the road, allowing cars to pass underneath, which will largely increase the utilization of road space. "With a carrying capacity of 1,200 people at a time, the TEB has the same functions as the subway while its cost of construction is less than one fifth that of the subway. Its construction can be finished in one year," said Bai Zhiming, engineer in charge of the...

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Acoustic Levitation: How Sound Can Get Physical

Posted by K R on

Acoustic Levitation: How Sound Can Get Physical

Imagine how much easier life would be if it was possible to levitate objects. Maglev trains, for example, use powerful magnets to repel the carriages and remove the friction of the train on the tracks. But magnets are just one way of achieving this – and they require the object to have a repelling magnetic force. Now scientists in Japan have shown that a similar effect can be achieved with sound. In this video they show that it is not only possible to levitate objects in mid-air using sound waves, but also to move them around. The results can be...

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